JPH0656244U - PC slab through hole processing structure and metal fittings - Google Patents

Abstract

(57) [Abstract] [Purpose] PC slab through-hole treatment that allows high-density filling of refractory materials such as rock wool to improve fire resistance, simplifies treatment work, and enables quick and inexpensive construction. Provide structure and fittings. [Structure] A slab tray 2 is attached to a lower portion of a through hole formed in a PC slab 1. The bottom plate 3 is set on the bottom plate supporting portion 2c of the slab tray 2. A refractory material such as rock wool 5 is filled in the through hole on the bottom plate 2 with the cable C inserted through the insertion hole 3a formed in the central portion of the bottom plate 3. Reference numerals 4 and 6 are heat-resistant sealing materials.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a processing structure for a PC (precast concrete) slab through hole and a metal fitting.

[0002]

[Prior art]

 In general, a through hole is formed in a PC slab, a cable or the like is inserted through the through hole, and then fireproof treatment is performed with rock wool or the like.

Conventionally, as a processing structure of this type, as shown in FIG. 6, a split type metal slab pot P is fitted into a through hole through which a cable C is inserted, and a heat-resistant sealing material S or It was filled with rock wool R and the like.

However, in the above-mentioned conventional treatment structure, there is a possibility that a gap G may be formed between the wall surface of the tapered through hole and the metal slab pot P, which makes the construction difficult and the fireproof treatment becomes incomplete. There were problems such as.

[0005]

[Problems to be solved by the device]

 The present invention has been made in order to solve the above-mentioned conventional problems, and its purpose is to improve the fire resistance performance by densifying the filling of fire resistant material such as rock wool with high density. It is an object of the present invention to provide a processing structure for a PC slab through hole and a metal fitting that can be processed quickly and inexpensively by simplifying the processing work.

[0006]

[Means for Solving the Problems]

 The processing structure of the PC slab through hole according to the present invention is such that the slab tray is attached to the lower part of the through hole formed in the PC slab, the bottom plate is set on the bottom plate supporting portion of the slab tray, and the PC slab is formed in the center part of the bottom plate. It is characterized in that a refractory material is filled in the through hole on the bottom plate in a state where the cable is inserted into the through hole.

Further, the PC slab through hole processing metal fitting of the present invention comprises a slab tray attached to a lower portion of the PC slab through hole, and a bottom plate set on a bottom plate supporting portion of the slab tray. And The slab tray has a flange portion fixed to the PC slab. The bottom plate is divided through an insertion hole formed in the center.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a PC slab having a predetermined through hole 1a through which a cable or the like is to be inserted. A metal slab tray 2 is attached to the lower portion of the through hole 1a.

As shown in FIG. 2, the metal slab tray 2 includes a cylindrical sleeve portion 2a, a flange portion 2b integrally formed on the upper end of the sleeve portion 2a on the outer side, and the sleeve. The bottom plate supporting portion 2c is integrally formed on the lower end of the portion 2a.

As can be seen from FIG. 1, the flange portion 2b of the slab tray 2 is embedded in the PC slab 1, and the slab tray 2 is integrally fixed to the PC slab 1. In this case, it is preferable that the bottom plate supporting portion 2c is set in accordance with the lower end portion of the through hole 1a, that is, the lower surface of the PC slab 1.

Next, as shown in FIG. 3, the cable C is inserted into the through hole 1 a, and then the bottom plate 3 is set. As is clear from FIGS. 4A and 4B, the bottom plate 3 is divided into left and right parts, and its outer diameter is slightly smaller than the inner diameter of the sleeve portion 2a of the slab pot 2. It is designed to be set on the bottom plate supporting portion 2c. An insertion hole 3a is formed in the center of the bottom plate 3. The insertion hole 3a is formed in an arbitrary shape and size according to the thickness and the number of the cables C.

Subsequently, as shown in FIG. 5, the heat-resistant seal material 4 and the rock wool 5 are filled from the bottom into the through-hole 1a on the bottom plate 3 set as described above, and the above-mentioned The heat-resistant sealing material 6 is additionally attached to complete the processing work.

[0013]

[Effect of device]

 1) Since the slab tray is attached to the lower part of the through hole of the PC slab, only the bottom plate was set on site and the refractory material was directly filled into the through hole, so the work was simple and the refractory material was removed. It can be filled with high density without gaps. 2) Since metal fittings can be used regardless of the slab thickness, it can be provided at low cost as a common component for all PC slabs.

[Brief description of drawings]

FIG. 1 is a sectional view of a PC slab in which a slab tray is attached to a through hole.

FIG. 2 is a perspective view of a slab tray.

FIG. 3 is a cross-sectional view of a PC slab in which a cable is inserted in a through hole.

FIG. 4 is an explanatory diagram in which a bottom plate is set on a slab tray.

FIG. 5 is a cross-sectional view of a PC slab in which a through hole through which a cable is inserted is fireproofed.

FIG. 6 is an explanatory diagram of a conventional through-hole processing method using a slab pot.

[Explanation of symbols]

 1 PC slab 1a through hole 2 slab tray 2a sleeve part 2b flange part 2c bottom plate support part 3 bottom plate 3a insertion hole 4 heat resistant seal material 5 rockwool 6 heat resistant seal material C cable

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Satoshi Hiroki 1-4-4 Honmachi, Ageo City, Saitama Prefecture

Claims (4)

[Scope of utility model registration request] 1. A slab tray is attached to a lower portion of a through hole formed in a PC slab, a bottom plate is set on a bottom plate supporting portion of the slab tray, and a cable is inserted into an insertion hole formed in a central portion of the bottom plate. A treatment structure for a PC slab through hole, characterized in that a refractory material is filled in the through hole on the bottom plate in a raised state. 2. A processing fitting for a PC slab through hole, comprising: a slab tray attached to a lower portion of the through hole of the PC slab; and a bottom plate set on a bottom plate supporting portion of the slab tray. 3. The processing tool for processing a PC slab through hole according to claim 2, wherein the slab tray has a flange portion fixed to the PC slab. 4. The PC according to claim 3, wherein the bottom plate is divided through an insertion hole formed in the central portion.
Processing fittings for slab through holes.